Brake for elastic-fluid turbines.



'PATBNTED MAR. 10, 1908.

W. L. R. EMMET. BRAKE FOR ELASTIC FLUID TURBINES.

APPLICATION FILED JULY 9, 1904.

2 SHEETS-SHEET 1 m Mm. mm wk n m 9 W No. 881,563; 'PATENTED MAR.10, 1908.

W. L. R. BMMET. BRAKE FOR ELASTIC FLUID TURBINES.

APPLICATION FILED JULY 9, 1904.

' 2 sums-SHEET 2.

uv u L W e y. M .H M o. F W 1 w 7 Q n J o V m o m .6 v. o M o o 0 m 0 0 O O O 0 n a e 6 5 in m bm 7 W x urn STATES WILLIAM L. R. EM MET, O1 SCHENECTADY, NEW YORK, ASSIGNOR TO ('rENERA COMPANY, A CORPORATION OF NEW YORK.

No. 881,563. Specification of Application filed July 9, 1904.

risen.

L ELECTRIC BRAKE FOR ELASTIC-FLUID TURBINES.

Letters Patent.

Serial No. 215,868.

Patented March 10, 1908.

To all whom it may concern:

Be it known that l, "iLLL-in L. R. En- MET, a citizen of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements in Brakes for Elastic-Fluid 'lurbincs, of which the following is a specification.

This invention. relates to turbine engines operated by fluid pressure, and its object is to provide an improved brake by which the machine can be quickly brought to 5 rest after the steam or other elastic fluid has been shut off. Some such device is essential in the case of a large turbine, which if left to itself will spin a long time after the main throttle has been closed. I

The present invention is an improvementupon the brakiitig devices heretofore used and its purpose is to simplify the construc tion and provide a strong powerful brake which canbe easily operated by one man. To this end, a movable member carrying brakoshoes is ,hinged at a point at one side of the sliaft, and at the opposite side is engaged by a lever which can he actuated by a screw to apply or release the brake.

In the accompanying drawings, Figure 1 is a side elevation of my improved brake as applied. to a vertical turbine, a port-ion of the turbine wheel and casing being shown in section; Fig. 2 is a top plan view of the brake, the shaft and a part of the casing being in section; and Fig. 3 a sectional side elevation showing a modification L the upright turbine which 1 have selected to illustrate myinvention, the shaft 1 carries th horizontal wheel 2 on which are mounted the buckets 3 which alternate with the stationary intermediates 4, supported by the casing 5.

In Fig. 1 the base 6 of the casing has at one side a flanged nozzle 7 for leading oil the exhaust steam to a condenser. In Fig. 3 the base 8 is higher, and constitutes itself a con- 1 denser; as fully disclosed in my pending application filed Sept. 14, 1903, Serial Number 173,027. in either case, the wheel 2 is atthc top of a chamber into which the steam exhausts and in which is placed the brake wear-plate 1) fastened to the bottom of the wheel concentric with the shaft, with its uno5 der surface lying in a plane of revolution. j

; Immediately below this is located an annular frame 10 surrounding the shaft and having at one side thereof cars 11 which are hinged to suitable bearings supported on the casing 12 in which islocated the step-bearing.

In Figs. 1 and 2, the ears are hinged to the heads 13) of stout upright bolts 14 which are suitably supported on the casing 12. The supportsare preferably blocks 15 bolted to faces on the side of the casing and each containing a smooth hole'to receive and guide its bolt. The object of using blocks 15 separate from the casing 12 and fastened thereto is simply to facilitate the i'nachii'iing of these parts. A nut.1.6 on the bolt rests on the block and enables the hinge to be adjusted vertically in order to bring the brake-shoes exactly parallel with the surface of the wearplate. A lock nut 16 secures the bolt when adjusted. The frame carries on its upper side two or more brake-shoes 17, which are suitably secured to the frame, as by screws 18, and have flat top faces to bear against the plane under surface of the wear-plate 9.

Various arrangci'nents of operating mechanism may be employed, but I prefer to provide the frame with a nose 19 on the side opposite the hinges, and to place under this point of contact with the nose, and having a long arm which can be moved by a screw 22. In Figs. 1 and 2, the lever is fulcrumed 0n lugs 23 cast on the casing 12. In Fig. 3, it is pivoted in a bracket 24 projecting from a base 25 resting on the top of the rentrant chamber or casing 12 for the step-bearing. This base 25 also supports a pedestal 26 to which the frame 10 is hinged.

In Figs. 1 and 2, the long arm of the lever may conveniently extend into the nozzle 7 where it carries a nut 27- Ineshing with the screw 22, the latter passing through a stuffing-box 28 on the nozzle and having a head 29.to receive a wrench. A nut 30 onv the screw serves as a stop to limit the lowering of the lever when the brake is released. In

nose a lever 20 fulcrumcd at'21 near the I 

